Park Depot Greenway_PCN_Section E Stormwater_24May2016.pdf

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PCN Form – Version 1.3 December 10, 2008 Version

6. Buffer Mitigation (State Regulated Riparian Buffer Rules) – required by DWQ
6a. Will the project result in an impact within a protected riparian buffer that requires
buffer mitigation?
Yes No

6b. If yes, then identify the square feet of impact to each zone of the riparia n buffer that requires mitigation. Calculate the
amount of mitigation required.
Zone
6c.
Reason for impact
6d.
Total impact
(square feet)

Multiplier
6e.
Required mitigation
(square feet)
Zone 1 3 (2 for Catawba)
Zone 2 1.5
6f. Total buffer mitigation required: 0
6g. If buffer mitigation is required, discuss what type of mitigation is proposed (e.g., payment to private mitigation bank,
permittee responsible riparian buffer restoration, payment into an approved in-lieu fee fund).
Buffer mitigation is not required for the unavoidable buffer impacts resulting from the proposed greenway project.
6h. Comments: Per the Neuse River Basin riparian buffer rules, impacts to protected riparian buffers resulting from greenway
construction are "allowable". As such, no mitigation is required for the proposed riparian buffer impacts.

E. Stormwater Management and Diffuse Flow Plan (required by DWQ)
1. Diffuse Flow Plan
1a. Does the project include or is it adjacent to protected riparian buffers identified
within one of the NC Riparian Buffer Protection Rules? Yes No
1b. If yes, then is a diffuse flow plan included? If no, explain why.
Comments: For the most part, stormwater will not be collected, but allowed to sheet-
flow off the path. Typically, where it is being collected, it will be conveyed in grass
swales. Most collected stormwater will be on the upslope side to bypass offsite
runoff around the trail. Additionally, there is one location where offsite runoff will be
bypassed beneath the path into an existing conveyance without modifying the
capacity of that conveyance. NOTE: Please see the attached Erosion Control
Drawings to see the most detailed information of measures to handle stormwater.
Yes No

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PCN Form – Version 1.3 December 10, 2008 Version

2. Stormwater Management Plan
2a. What is the overall percent imperviousness of this project? 29.8 %
2b. Does this project require a Stormwater Management Plan? Yes No
2c. If this project DOES NOT require a Stormwater Management Plan, explain why: All stormwater will be allowed to sheet
flow off the proposed path or will utilize existing conveyances. There will be no new conveyances through the buffer.
2d. If this project DOES require a Stormwater Management Plan, then provide a brief, narrative description of the plan:

2e. Who will be responsible for the review of the Stormwater Management Plan?
Certified Local Government
DWQ Stormwater Program
DWQ 401 Unit
3. Certified Local Government Stormwater Review
3a. In which local government’s jurisdiction is this project? N/a
3b. Which of the following locally-implemented stormwater management programs
apply (check all that apply):
Phase II
NSW
USMP
Water Supply Watershed
Other:
3c. Has the approved Stormwater Management Plan with proof of approval been
attached?
Yes No
4. DWQ Stormwater Program Review
4a. Which of the following state-implemented stormwater management programs apply
(check all that apply):
Coastal counties
HQW
ORW
Session Law 2006-246
Other:
4b. Has the approved Stormwater Management Plan with proof of approval been
attached? Yes No
5. DWQ 401 Unit Stormwater Review
5a. Does the Stormwater Management Plan meet the appropriate requirements? Yes No
5b. Have all of the 401 Unit submittal requirements been met? Yes No